Audio speaker



FIG. 1 is a top, front perspective view of an audio speaker incorporating our new design;

FIG. 2 is a bottom, rear perspective view of the audio speaker;

FIG. 3 is a front elevation view of the audio speaker;

FIG. 4 is a rear elevation view of the audio speaker;

FIG. 5 is a left side elevation view of the audio speaker;

FIG. 6 is a right side elevation view of the audio speaker;

FIG. 7 is a top plan view of the audio speaker; and,

FIG. 8 is a bottom plan view of the audio speaker.

The broken lines represent portions of the audio speaker that form no part of the claimed design. 

CLAIM The ornamental design for an audio speaker, as shown and described. 